import java.util.Scanner;
     class mian {
         public static void main(String[] args) {
             System.out.println("请输入number1:" + "\n" + "请输入number2:");
             Scanner in = new Scanner(System.in);
             double number1 = in.nextDouble();
             double number2 = in.nextDouble();
             System.out.println("微型计算机" + "\n" + "1.求和" + "\n" + "2.求差" + "\n" + "3.求积" + "\n" + "4.求商" + "\n" + "5.求余" + "\n" + "6.退出");
             System.out.println("请选择你想执行的操作:");
             Scanner sc = new Scanner(System.in);
             long 操作 = sc.nextLong();
             if (操作 == 1) {
                 System.out.println("和=" + (number1 + number2));
             } else if (操作 == 2) {
                 System.out.println("差=" + (number1 - number2));
             } else if (操作 == 3) {
                 System.out.println("积=" + (number1 * number2));
             } else if (操作 == 4) {
                 System.out.println("商=" + (number1 / number2));
             } else if (操作 == 5) {
                 System.out.println("余=" + (number1 % number2));
             } else if (操作 == 6) {
                 System.out.println("退出");
             } else {
                 System.out.println("程序结束！");
             }
         }
     }